title: Nasal pulse oximetry overestimates oxygen saturation.
abstract: Ten surgical patients were monitored with nasal and finger pulse oximetry (Nellcor N-200) for five study periods with alternating mouth and nasal breathing and switching of cables and sensors. Nasal pulse oximetry was found to overestimate arterial oxygen saturation by 4.7 (SD 1.4%) (bias and precision).
authors.affiliation: Department of Surgical Gastroenterology, Hvidovre University Hospital, Denmark.
authors.forename: J
authors.initials: J
authors.lastname: Rosenberg
authors.forename: M H
authors.initials: MH
authors.lastname: Pedersen
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D006801:Humans; D008875:Middle Aged; D009666:Nose / Q000098:blood supply*; D010092:Oximetry / Q000592:standards*; D010100:Oxygen / Q000097:blood*
chemical_list: D010100:Oxygen